<em># 转字符串</em>
<em>String</em> v = <s>recognizer</s>.<b>toString</b>( 		
	<em>{ DiagnosticLevel minLevel = DiagnosticLevel.debug }</em>
	<u>minLevel</u>: 	<q>DiagnosticLevel</q>. 	<i>debug</i> 		<em>// 调试 	=> TapGestureRecognizer#09a1f(state: ready, won arena, finalPosition: Offset(102.0, 92.0), finalLocalPosition: Offset(112.0, 46.0), sent tap down) </em>
								<i>warning</i> 		<em>// 警告 => TapGestureRecognizer#46ebf</em>
								<i>error</i> 		<em>// 错误  => TapGestureRecognizer#425d4</em>
								<i>fine</i> 		<em>// => TapGestureRecognizer#f4788(debugOwner: null, state: ready, won arena, finalPosition: Offset(150.0, 97.0), finalLocalPosition: Offset(160.0, 51.0), sent tap down)</em>
								<i>hidden</i> 		<em>// 隐藏 => TapGestureRecognizer#300c8(debugOwner: null, state: ready, won arena, finalPosition: Offset(98.0, 85.0), finalLocalPosition: Offset(108.0, 39.0), sent tap down)</em>
								<i>hint</i> 		<em>// => TapGestureRecognizer#b4dba</em>
								<i>info</i> 		<em>// 消息 => TapGestureRecognizer#c56b5(state: ready, won arena, finalPosition: Offset(102.0, 93.0), finalLocalPosition: Offset(112.0, 47.0), sent tap down)</em>
								<i>off</i> 			<em>// => TapGestureRecognizer#1d300</em>
								<i>summary</i> 	<em>// => TapGestureRecognizer#36dc5</em>
)
<em># 短字符串</em>
<em>String</em> v = <s>recognizer</s>.<b>toStringShort( )</b>
<em># 深层字符串</em>
<em>String</em> v = <s>recognizer</s>.<b>toStringDeep</b>( 		
	<em>{ String prefixLineOne = '', String prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug }</em>
	<u>prefixLineOne</u>: '',
	<u>minLevel</u>: 	<q>DiagnosticLevel</q>.<i>debug</i> 
)	
<em># 字符串</em>
<em>String</em> v = <s>recognizer</s>.<b>toStringShallow</b>( 		
	<em>{ String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug }</em>
	<u>joiner</u>: '',
	<u>minLevel</u>: 	<q>DiagnosticLevel</q>.<i>debug</i> 
)